How Do I Constrain Coordinates Range of Motion?

[Peter Nguyen]

Hi,

I am having trouble with setting the min-max range for the coordinate of my model.
I have tried to modify the range inside the .osim file,I have also made sure to set <clamped>true<clamped> in the .osim file.
The numbers displayed in the coordinate window does change, but the value can still be out of the range.

For example. hip_rotation range was set to -10 to 45 degrees, clamp is toggled, yet the value can be out side of the specify range.

Nothing seems to work to constrain the range of motion for my coordinate which made my simulation (inverse Kinematic) to have weird poses and walking posture.

Have you encountered the same problem and how did you solve it?

[Dimitar Stanev]

Can you provide screenshots? It is possible that the problem originates in the marker placement and correspondence between pairs.

[Peter Nguyen]

Thanks. I have attached the screen shot below.

The body is strangely twisted and the values for some coordinates were beyond its range.
Let me know if you need to see other files.

[Dimitar Stanev]

Can you also visualize the .trc file (File -> Preview Experimental Data)? I think it is not a problem of the IK tool or range of coordinates, but a bad placement and correspondence of the markers or possible the marker trajectory is not proper. By visualizing this, it will help you pinpoint the error.